Help on CPU Upgrade

[Carl1886]

I have an older Dell tower pc that I don't want to throw out. Its a Precision T3500 and I'm looking to upgrade the CPU. The documentation (Pictured Below) on Dell's website says the compatible CPUs are Intel Xeon 3500 Series and the Intel Xeon 5500 Series with socket LGA 1366. With this information what is the fastest compatible processor for this machine? I am having difficulties with my research.  

 

Link to Service manual:

Dell Precision T3500 Service Manual

[ProjectBox153]

It may not be the fastest CPU you can put into it, but I run a Xeon X5675 in my Precision T3500. I think it's a great balance between price (I paid $25 for mine on eBay), power consumption, heat and performance. The original heatsink keeps it relatively cool without any additional fans, and the performance is great. 

[Carl1886]

10 hours ago, ProjectBox153 said:

It may not be the fastest CPU you can put into it, but I run a Xeon X5675 in my Precision T3500. I think it's a great balance between price (I paid $25 for mine on eBay), power consumption, heat and performance. The original heatsink keeps it relatively cool without any additional fans, and the performance is great. 

Is that the six core Xeon at 3.06 GHz?

[ProjectBox153]

1 minute ago, Carl1886 said:

Is that the six core Xeon at 3.06 GHz?

Yes. It's the last machine at the bottom of my signature.